Daikin RMXS-L Series, Руководство по обслуживанию

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SiUS181305E Troubleshooting for FFQ Series
Troubleshooting 168
5.2 Drain Level Control System Abnormality
Error Code
A3
Method of Error
Detection
The float switch detects error.
Error Decision
Conditions
When the water level reaches its upper limit and when the float switch turns OFF
Supposed
Causes

Defective drain pump

Improper drain piping work

Clogged drain piping

Defective float switch

Defective indoor unit PCB

Defective short circuit connector X15A on indoor unit PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Connect the drain pump.
Replace the indoor unit
PCB.
Replace the drain pump.
There is a drain system
abnormality.
Connect the float switch.
Replace the float switch.
Replace the indoor unit
PCB.
(R19188)
NO
YES
NO
NO
YES
YES
Is the drain
pump connected to the
indoor unit PCB?
NO
Is the drain water level
abnormally high?
YES
YES
Is the float switch
connected to X15A?
NO
Does the
drain pump work after
restarting operation?
Set to
emergency and
check the voltage of X25A.
220 ~ 240 VAC?
YES
Remove the float switch from
X15A, short circuit X15A, and
restart operation.
NO
Is
A3
displayed on the remote
controller display?